PDF malware analysis — malicious · 2408a5ae0151d48e

MALICIOUS

PDF

79.7 KB Created: 2021-05-30 12:32:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24

MD5: fb85581242ce6ed1c341aa0880352a4b SHA-1: a8be1c4622fe514528adda9e87f02f85d06a6756 SHA-256: 2408a5ae0151d48e8c44e102fa1e291f97080e145a66aa8e388b435797c87ac4

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting it functions as a link farm for SEO spam or phishing. The embedded URLs, such as 'https://bologen.ru/strik?utm_term=peppered+moth+simulation+lab+report', are likely used to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM

Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
External URI info PDF_URI

PDF contains an external URL action
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
Embedded URL info EMBEDDED_URL

One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
URL https://bologen.ru/strik?utm_term=peppered+moth+simulation+lab+report PDF link annotation
- https://lumevukivejus.weebly.com/uploads/1/3/0/8/130874583/kekufutukevume.pdfIn PDF document text
- https://fobaripiso.weebly.com/uploads/1/3/4/4/134443650/jutiliwemeb.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4420602/normal_60472b7eb1ca2.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4485580/normal_60017b5947a15.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470222/normal_60469038408fa.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4422378/normal_602a339af264b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446390/normal_6009b8d3f16ff.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4369520/normal_602de1b8d5d97.pdfIn PDF document text
- https://tagenomamoz.weebly.com/uploads/1/3/4/4/134476715/895853.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4449603/normal_5fca64cc91b6c.pdfIn PDF document text
- https://rasawuket.weebly.com/uploads/1/3/4/4/134479783/96031dadcf1.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4411917/normal_603443a7c39ce.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470207/normal_602c8b656123d.pdfIn PDF document text
- https://fodumalape.weebly.com/uploads/1/3/2/6/132695584/ab35cd85fcb0237.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4409123/normal_6024269849861.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4415935/normal_5fe0c23c4d003.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4454182/normal_606bd58bc92cb.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4445889/normal_5fef09f37f93c.pdfIn PDF document text
- https://nusosujorogu.weebly.com/uploads/1/3/4/5/134589145/5252271.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/a1ca3b24-7eec-49e7-9741-607a0e21311e/what_does_a_crossover_ethernet_cable_look_like.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2fa26740-1de5-4fce-be76-9c970f2f8e47/org_chart_creator_online.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/75e47822-ac17-416d-b88c-b7d94a82658c/hoover_max_extract_not_picking_up_water.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/88e30f17-5a4e-48c1-a798-cc842baf49a3/mofesepipiri.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2ef8a328-593e-4d22-bb46-15f499b1cd65/what_is_the_average_salary_of_a_technical_writer.pdfIn PDF document text
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In PDF document text
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eefa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEFA	5224 bytes
SHA-256: `e87a14d499efe9a1977aa0203c09665d4d33f29b2ae03f9eedd9813e728cb4a5`
`font_01_sfnt_off00010081.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10081	10132 bytes
SHA-256: `3078b06e325e0e89d93deb609d9232ccef6c968c471f7a1d9bb124fcceb5e506`
`font_02_sfnt_off00012316.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12316	4324 bytes
SHA-256: `ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3`

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